pxt-calliope/docs/reference/pins/analog-pitch.md

# Analog Pitch

Emits a Pulse With Modulation (PWM) signal to the pin ``P0``.
Use [analog set pitch pin](/reference/pins/analog-set-pitch-pin) to set the current pitch pin.

```sig
pins.analogPitch(440, 300)
```

### Parameters

* `frequency` : [Number](/types/number)
* `ms`: [Number](/types/number)

### Example

```blocks
pins.analogSetPitchPin("P0")
let frequency1 = 440
let duration = 1000
pins.analogSetPitchPin(AnalogPin.P1);
pins.analogPitch(frequency1, duration)
```

### Some common notes

* 440 = A4 on piano
* see [piano key frequencies ](https://en.wikipedia.org/wiki/Piano_key_frequencies) for more information

### See also

[@boardname@ pins](/device/pins), [analog set period](/reference/pins/analog-set-period), [analog set pitch pin](/reference/pins/analog-set-pitch-pin)